7. Find the perimeter of the rectangle whose length is 40 cm and a diagonal is 41 cm.
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7. Find the perimeter of the rectangle whose length is 40 cm and a diagonal is 41 cm.
7. Find the perimeter of the rectangle whose length is 40 cm and a diagonal is 41 cm.
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Answer:
l =40
d =41
p=98 cm. .........
Verified answer
=> Given that length of the side of the rectangle is L = 40 cm and
=> The length of a diagonal is d = 41 cm
=> Let Breadth be bcm
=> Therefore, L² + b² = d²
=> 40² + b² = 41²
=> b² = 81
=> b = 9 cm
=> We know that the perimeter of the rectangle is 2 ( l + b ) = 2 ( 40 + 9 )
=> 98 cm
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